岩石中爆炸成坑效应的模型试验方法及对比分析

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Abstract The similitude law and the dimensionless equations of cratering explosions were derived. Some basic principles essential to the centrifugal modeling system and the vacuum chamber modeling system were described according to the similitude law of cratering explosions. Some characteristics of the two kind modeling systems were revealed through the parametrical sensitivity analyses. The sizes of centrifugal modeling box are proportional to both the scaled depth-of-burial(SDOB) and the scaled explosive weight，and the centrifugal acceleration is proportional to both the prototype explosive weight and scaled explosive weight. There are no special requirements about the modeling materials，the external pressures and the explosion source. Generally，the centrifugal modeling system has clear advantages in simulating the small-scale and shallow-depth explosions；while it can not simulate the large-scale explosions. Actually，the vacuum chamber modeling system is more controllable and variable as there is no need to provide additional acceleration. Therefore，the vacuum chamber modeling system has superiorities in simulating the large-scale cratering explosions；but it does not consider the physical process of rock crushing and can not simulate the cavity formations and the impact effects.

Key words： rock mechanics blasting mechanism of cratering explosion sensitivity analysis gravitational acceleration similitude law centrifugal machine

Received: 13 May 2014

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https://rockmech.whrsm.ac.cn/EN/Y2014/V33/I9/1925

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